• There are many types (group) of Aliens (and their UFOs) , 4 at least .
• They (2 types at least) live here (on earth) , by God's permission , long before we are here
• 1 (at least) type of Alien is extra-terestrial by origin
• 1 (at least) type of Alien tends to "cheat" us to gain control on mankind
• They tend to use Historical and Religious occasions to gain our confidance
• They have the ability to perform visibility / invisibility and (some types) to shape-shift
• They (2 types at least) are more likely "extra-dimensional" than "extra-terestrial"
• Bad "influenced" Aliens are not much of a threat to us , unless we are willing to be their "followers"

There are many other facts and limitations of UFO / ET / Alien not mentioned here , but all those are within GOD's rules . Explainable and understandable , for those who are willing to think open-minded and scientifically . A little bit complex to understand without knowing the whole basic concept of GOD and universe , again , scientifically .

Science without knowledge in God , will be dangerous . Religion (believe and faith in God) without knowledge and science , will be static (just like plants). Mankind are not made of "sophisticated" matters phisically (compare to Aliens) , but we are superior and above of all the entity in the universe , overall systems-wise , by God's will . Our "power-of-mind" known as the most sophisticated ever made by God .

All those phenomenas are stated and explained in Islam , some are clearly stated and explained by God through The Holly Quran , evidance written in The Holly Bible , etc . The more we know about Aliens existance , the more we will understand the real truth on the universe and GOD . Our God (one and the only) is not just a definitive God , THE ABSOLUTE GOD.